Though I agree with fellow reviewer Melvyn totally - on every aspect mentioned.. I'll also add it's spacious and has plenty of equipment. It's just that North Sydney Fitness First is "old" lots of the equipment is old and well used, and it kid of smells. Also as you can imagine after work hours (5:30pm) it gets absolutely packed. This doesn't mean the staff aren't friendly or don't try. Just that it's location and age, makes it just an okay gym rather than great. Oh and parking is metered all around the area.
Been going to this gym for 3 years now, and haven't had any issues at all. It has a great positive atmosphere, staff friendly staff, and even some personal trainers will offer to help you out.